iRhythm Ownership | Who Owns iRhythm?

Overview Forecast RevenueFinancials Chart Transcripts

iRhythm Ownership Summary

iRhythm is owned by 5.16% institutional investors, 1.11% insiders, and 93.73% retail investors. Sands capital management is the largest institutional shareholder, holding 10.16% of IRTC shares. Sands Capital Global Growth Equity is the top mutual fund, with 8.60% of its assets in iRhythm shares.

IRTC Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	iRhythm	5.16%	1.11%	93.73%
Sector	Healthcare Stocks	279.18%	10.62%	-189.80%
Industry	Medical Device Stocks	32.66%	10.50%	56.84%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Sands capital management	3.18M	10.16%	$286.44M
Vanguard group	3.14M	10.03%	$282.81M
Artisan partners limited partnership	2.76M	8.84%	$249.12M
Blackrock funding, inc. /de	2.73M	8.73%	$246.06M
Blackrock	2.50M	8.03%	$269.35M
Capital research global investors	1.64M	5.24%	$147.61M
Mackenzie financial	1.38M	4.42%	$48.15M
State street	896.85K	2.88%	$96.54M
Bnp paribas asset management	900.12K	2.88%	$81.16M
Westfield capital management co lp	765.25K	2.45%	$69.00M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Ophir asset management pty	427.40K	5.74%	$38.54M
First light asset management	325.05K	3.89%	$34.03M
Braidwell lp	556.39K	2.05%	$58.24M
Kampmann melissa s.	23.93K	1.70%	$2.16M
Rock springs capital management lp	397.50K	1.36%	$35.84M
Eventide asset management	739.41K	1.21%	$66.66M
Sands capital management	3.18M	0.85%	$286.44M
Slate path capital lp	510.50K	0.83%	$46.03M
Stephens investment management group	502.93K	0.61%	$45.35M
Redmile group	56.84K	0.56%	$5.95M

Top Buyers

Holder	Shares	% Assets	Change
Sands capital management	3.18M	0.85%	1.05M
Ophir asset management pty	427.40K	5.74%	427.40K
Millennium management	399.75K	0.02%	339.53K
Bessemer group	568.01K	0.08%	299.73K
Westfield capital management co lp	765.25K	0.30%	236.96K

Top Sellers

Holder	Shares	% Assets	Change
Alliancebernstein	39.72K	0.00%	-1.17M
Fiera capital	-	-	-381.64K
Alyeska investment group	-	-	-351.75K
Capital research global investors	1.64M	0.03%	-317.97K
Point72 asset management	-	-	-272.08K

New Positions

Holder	Shares	% Assets	Change	Value
Ophir asset management pty	427.40K	5.74%	427.40K	$38.54M
Raymond james financial	101.49K	0.00%	101.49K	$9.15M
Adage capital partners gp	100.00K	0.02%	100.00K	$9.02M
Norges bank	83.93K	0.00%	83.93K	$9.03M
Redmile group	56.84K	0.56%	56.84K	$5.95M

Sold Out

Holder	Change
National bank of canada /fi/	-1.00
Coppell advisory solutions	-1.00
Financial gravity asset management	-2.00
Innealta capital	-2.00
Westend capital management	-5.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2025	8	-96.69%	1,629,968	-95.25%	5	0.04%	4	-96.43%	4	-95.35%
Dec 31, 2024	147	-44.11%	24,053,140	-29.85%	76	0.64%	71	-47.79%	51	-23.88%
Sep 30, 2024	262	9.17%	34,287,771	-3.47%	109	0.84%	136	1.49%	66	4.76%
Jun 30, 2024	240	-10.45%	35,520,791	3.71%	114	0.94%	134	3.08%	63	-30.77%
Mar 31, 2024	268	13.08%	34,250,266	4.14%	110	0.95%	130	6.56%	91	30.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Sands Capital Global Growth Equity	2.75M	8.60%	-179.16K
American Funds SMALLCAP World A	1.49M	4.73%	573.30K
Vanguard US Total Market Shares ETF	1.01M	3.21%	68.62K
Canada Life US Small-Mid Cap Growth A	1.00M	3.19%	-41.02K
Vanguard Total Stock Mkt Idx Inv	1.00M	3.15%	12.06K
Canada Life US Small-Mid Cap Growth F	880.18K	2.76%	-49.24K
iShares Russell 2000 ETF	800.67K	2.51%	393.00
Vanguard Small Cap Index	788.49K	2.47%	4.18K
Artisan Mid Cap Investor	651.47K	2.06%	28.51K
Artisan U.S. Mid-Cap Growth	651.47K	2.06%	28.51K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 10, 2025	Patterson Chad	Chief Commercial Officer	Sell	$54.45K
Jun 02, 2025	Shrishrimal Sumi	EVP, Chief Risk Officer	Sell	$225.46K
Jun 02, 2025	Rosenbaum Marc W.	Chief Accounting Officer	Sell	$97.59K
May 02, 2025	Wilson Daniel G.	Chief Financial Officer	Sell	$250.00K
May 02, 2025	Patterson Chad	Chief Commercial Officer	Sell	$863.40K

Insider Transactions Trends

Date	Buy	Sell
2025 Q2	-	6
2025 Q1	-	16
2024 Q4	1	2
2024 Q3	-	4
2024 Q2	-	2

IRTC Ownership FAQ

Who Owns iRhythm?

iRhythm shareholders are primarily institutional investors at 5.16%, followed by 1.11% insiders and 93.73% retail investors. The average institutional ownership in iRhythm's industry, Medical Device Stocks, is 32.66%, which iRhythm falls below.

Who owns the most shares of iRhythm?

iRhythm’s largest shareholders are Sands capital management (3.18M shares, 10.16%), Vanguard group (3.14M shares, 10.03%), and Artisan partners limited partnership (2.76M shares, 8.84%). Together, they hold 29.03% of iRhythm’s total shares outstanding.

Does Blackrock own iRhythm?

Yes, BlackRock owns 8.03% of iRhythm, totaling 2.5M shares as of Jun 2024. This represents 0.01% of BlackRock's total assets, with a market value of 269.35M$. In the last quarter, BlackRock increased its holdings by 61.23K shares, a 2.51% change.

Who is iRhythm’s biggest shareholder by percentage of total assets invested?

Ophir asset management pty is iRhythm’s biggest shareholder by percentage of total assets invested, with 5.74% of its assets in 427.4K iRhythm shares, valued at 38.54M$.

Who is the top mutual fund holder of iRhythm shares?

Sands Capital Global Growth Equity is the top mutual fund holder of iRhythm shares, with 8.60% of its total shares outstanding invested in 2.75M iRhythm shares.

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